20 characters long password

[RX6800]

Hello
i've got simple question, how can i crack hash that i know the password is 20 characters long and it is only with numbers. I'm asking for every possible way with Hashcat for exact command for terminal or with any other tool if someone knows?

[DanielG]

hashcat.exe -a 3 -m [the mode of your hash] filewithyourhash.txt ?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d

[RX6800]

Code:

sudo hashcat -a 3 -m 22000 464.hc22000 ?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d

and i've got the following output

Code:

hashcat (v7.1.2-319-g710f178cd) starting

First_file_in_directory() failed.

First_file_in_directory() failed.

HIP API (HIP 7.0.51831)
=======================
* Device #01: AMD Radeon RX 6800, 16318/16368 MB, 30MCU

OpenCL API (OpenCL 3.0 ) - Platform #1 [Intel(R) Corporation]
=============================================================
* Device #02: Intel(R) UHD Graphics 770, 22308/44617 MB (2047 MB allocatable), 16MCU

OpenCL API (OpenCL 2.1 AMD-APP (3662.0)) - Platform #2 [Advanced Micro Devices, Inc.]
=====================================================================================
* Device #03: AMD Radeon RX 6800, skipped

Minimum password length supported by kernel: 8
Maximum password length supported by kernel: 63
Minimum salt length supported by kernel: 0
Maximum salt length supported by kernel: 256

Hashes: 1 digests; 1 unique digests, 1 unique salts
Bitmaps: 16 bits, 65536 entries, 0x0000ffff mask, 262144 bytes, 5/13 rotates

Optimizers applied:
* Zero-Byte
* Single-Hash
* Single-Salt
* Brute-Force
* Slow-Hash-SIMD-LOOP

Watchdog: Temperature abort trigger set to 90c

Host memory allocated for this attack: 4857 MB (42670 MB free)

Integer overflow detected in keyspace of mask: ?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d?d

Started: Wed Oct 29 09:48:33 2025
Stopped: Wed Oct 29 09:48:36 2025

[DanielG]

Yeah 20 digits is in no way practically attackable, you want to check 100000000000000000000 passwords. Your AMD Radeon RX 6800 can do around 1062 kH/s. Which means you need around 2984 millennia to check them all.